Browsing by Author "Lütgemeier H."

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Ba nuclear resonance in YBa2Cu2Oy

Yakubowskii A.; Egorov A.; Lütgemeier H. (1992)

The first observations of NMR and NQR of both isotopes135Ba and134Ba in isotopically enriched samples of YBa2Cu3Oy with oxygen concentrations y=6.0, 6.2, and 7.0 are described. The pure NQR frequencies and asymmetry parameter ...
Decrease of the homogeneous width of the Tm3+ electron energy levels in TmBa2CCu3 O6+x at the superconducting transition

Egorov A.; Lütgemeier H.; Wagener D.; Dooglav A.; Teplov M. (1992)

Enhanced NMR of 169Tm (I= 1 2) enhanced NMR has been studied in TmBa2Cu3O6+x, x=0, 0.2, 0.4, at temperatures 1.2-40K. The nuclear magnetic relaxation rates at T>20K increase exponentially as 1 T1(2) = R1(2)exp(-Δ/kT), with ...
NMR studies of singlet-ground-state rare-earth ions in high-Tc superconductors

Bakharev O.; Dooglav A.; Egorov A.; Lütgemeier H.; Rodionova M.; Teplov M.; Volodin A.; Wagener D. (1992)

Many of presently known high-Tc superconductors contain rare-earth (RE) ions with an even number of electrons in an unfilled 4f-shell (Pr3+, Tb3+, Ho3+, Tm3+). If the ground state of 4f-electrons is non-degenerate and ...

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